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31. 发明授权

US07953165B2 Transmitting apparatus in orthogonal frequency division multiplexing access system capable of controlling gain for variation of sub-channel allocation and method for transmitting data thereof 有权
标题翻译：能够控制用于子信道分配变化的增益的正交频分复用接入系统中的发送装置及其发送数据的方法
公开(公告)号：US07953165B2
公开(公告)日：2011-05-31
申请号：US11667938
申请日：2005-09-07
申请人： Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
发明人： Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04K1/10 , H04L27/28 , H04L27/00
CPC分类号： H04L27/2626 , H04L5/023
摘要： The present invention relates to a transmitter of an OFDMA system capable of controlling a gain for variation of subchannel allocation, and a method thereof. The transmitter includes a subchannel number determining unit, a modulator, a digital/analogue converter, and a gain controller controlling the gain. The subchannel number determining unit determines the number of subchannels in use according to communication environments, and the modulator modulates transmission data with reference to the number of subchannels determined by the subchannel number determining unit and outputs the modulated transmission data. The digital/analogue converter converts the transmission data into analogue data and transmits the converted analogue data through a transmit antenna. The gain controller controls gains of the transmission data according to gain values corresponding to the number of subchannels.
摘要翻译：本发明涉及能够控制用于子信道分配变化的增益的OFDMA系统的发射机及其方法。发射机包括子信道号确定单元，调制器，数/模转换器和控制增益的增益控制器。子信道号确定单元根据通信环境确定正在使用的子信道的数量，并且调制器参照由子信道号确定单元确定的子信道的数量来调制发送数据，并输出调制的发送数据。数字/模拟转换器将传输数据转换为模拟数据，并通过发送天线发送转换的模拟数据。增益控制器根据对应于子信道数量的增益值控制传输数据的增益。

32. 发明授权

US07813435B2 Carrier allocation method in OFDM system and transmitting apparatus using the method 有权
标题翻译： OFDM系统中的载波分配方法和使用该方法的发射装置
公开(公告)号：US07813435B2
公开(公告)日：2010-10-12
申请号：US11722028
申请日：2005-05-11
申请人： Hyeong-Sook Park , Youn-Ok Park
发明人： Hyeong-Sook Park , Youn-Ok Park
IPC分类号： H04K1/10
CPC分类号： H04L27/2608
摘要： The present invention relates to a method for allocating subcarriers in an orthogonal frequency division multiplex (OFDM) system, and a transmitter thereof. In the OFDM system according to an exemplary embodiment of the present invention, the subcarrier allocation is performed in the buffer (10) before a modulation mapping operation is performed according to a modulation method such that the delay may not be generated in the subchannel formed on the symbol axis. The delay corresponding to the symbols is prevented without using any additional hardware for eliminating the delay generated when the subcarriers are allocated to the subchannel formed on the symbol axis.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）系统中分配子载波的方法及其发射机。在根据本发明的示例性实施例的OFDM系统中，在根据调制方法执行调制映射操作之前，在缓冲器（10）中执行子载波分配，使得可以在形成的子信道中不产生延迟符号轴。防止对应于符号的延迟，而不使用任何额外的硬件来消除当子载波被分配到在符号轴上形成的子信道时产生的延迟。

33. 发明授权

US07796577B2 Method for designing operation schedules of FFT and MIMO-OFDM modem thereof 有权
标题翻译：用于设计FFT和MIMO-OFDM调制解调器的操作计划的方法
公开(公告)号：US07796577B2
公开(公告)日：2010-09-14
申请号：US11721421
申请日：2005-11-22
申请人： Jun-Woo Kim , Jae-Gun Jung , Youn-Ok Park
发明人： Jun-Woo Kim , Jae-Gun Jung , Youn-Ok Park
IPC分类号： H04J1/00 , H04J11/00 , H04W4/00 , H04B1/40 , H04B1/034 , H03D7/16
CPC分类号： H04L27/265 , H04L27/263
摘要： The present invention provides a method for designing operation schedules of a fast Fourier transform (FFT) and a multiple input multiple output orthogonal frequency division multiplexing modem (MIMO-OFDM modem) thereof. According to the present invention, an operation speed of an FFT operator is set up, a receiving symbol is arranged in an OFDM symbol duration in an FFT after receiving the symbol, a transmitting symbol is arranged in an OFDM symbol duration in the FFT schedule before transmitting the symbol, a transmitting/receiving symbol which has the same timing is inserted into an idle symbol duration of the FFT schedule, an FFT schedule which is good to be deleted is deleted, and symbols of the deleted FFT schedule are re-arranged in order to not have an error occur in transmitting/receiving timing.
摘要翻译：本发明提供一种用于设计快速傅立叶变换（FFT）及其多输入多输出正交频分复用调制解调器（MIMO-OFDM调制解调器）的操作计划的方法。根据本发明，建立FFT运算符的运算速度，在接收到符号之后，在FFT中以OFDM符号持续时间方式布置接收符号，在FFT调度表中以OFDM符号持续时间内排列发送符号发送符号时，将具有相同定时的发送/接收符号插入到FFT调度的空闲符号持续时间中，删除良好被删除的FFT调度，并且将删除的FFT调度的符号重新排列在为了在发送/接收定时中不发生错误。

34. 发明申请

US20100216459A1 CELL SEARCH DEVICE OF CELLULAR SYSTEM USING OFDMA SCHEME AND METHOD THEREOF 有权
标题翻译：使用OFDMA方案的细胞系统的细胞搜索装置及其方法
公开(公告)号：US20100216459A1
公开(公告)日：2010-08-26
申请号：US11721153
申请日：2005-11-30
申请人： Chang-Wahn Yu , Youn-Ok Park
发明人： Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04W36/00
CPC分类号： H04J11/0069 , H04J13/0022
摘要： A cell search device using an appropriate preamble for a downlink of a cellular system using an orthogonal frequency division multiplexing access (OFDMA) scheme and a method thereof is disclosed. The cell search device for a terminal of a cellular system using an orthogonal frequency division multiplexing access scheme includes when the terminal receives a preamble symbol from a base station, a PN code and phase delay estimating unit for generating a code with the received preamble symbol and a combination of a PN code and a Walsh code, calculating a correlation value therebetween using a differential demodulation for the codes to detect the PN code, a plurality of Walsh codes, and an error of a time delay, and estimating a component of a phase delay for the time delay; and a Walsh code estimating unit for minimizing the influence of the time error using the phase delay and the PN code information obtained by the differential demodulation of the PN code and phase delay estimating unit and estimating a Walsh code for the corresponding cell by synchronization demodulation.
摘要翻译：公开了一种使用正交频分复用接入（OFDMA）方案的蜂窝系统的下行链路的适当前导码的小区搜索装置及其方法。用于使用正交频分复用接入方式的蜂窝系统的终端的小区搜索装置包括当终端从基站接收到前导码符号时，PN码和相位延迟估计单元用于产生具有接收到的前导码符号的码， PN码和沃尔什码的组合，使用用于检测PN码的代码的差分解调，多个沃尔什码和时间延迟的误差来计算其间的相关值，并且估计相位的分量延迟延迟; 以及沃尔什码估计单元，用于使用相位延迟和通过PN码和相位延迟估计单元的差分解调获得的PN码信息来最小化时间误差的影响，并通过同步解调估计相应小区的沃尔什码。

35. 发明授权

US07782989B2 Apparatus and method for acquiring frame timing in communication system 有权
标题翻译：在通信系统中获取帧定时的装置和方法
公开(公告)号：US07782989B2
公开(公告)日：2010-08-24
申请号：US11636797
申请日：2006-12-11
申请人： Seung-Jae Bahng , Youn-Ok Park , Chang-Wahn Yu , Eon-Young Hong
发明人： Seung-Jae Bahng , Youn-Ok Park , Chang-Wahn Yu , Eon-Young Hong
IPC分类号： H04L7/00
CPC分类号： H04L27/2656 , H04L27/2676
摘要： Disclosed is an apparatus for acquiring initial frame timing in a communication system having a normalizer that calculates a normalized window power from powers of samples of received signal during a monitoring period, a cross power calculator that calculates a window cross power from cross powers of the samples during the monitoring period, and each cross power corresponds to multiplication of two of the samples, a divider that divides the window cross power by the normalized window power and outputs a metric for a sample corresponding to the monitoring period, and a peak-value detector that searches a sample having the maximum value among metrics for the samples of the received signals during a predetermined period, and the metrics are calculated by shifting the monitoring period, with a sample next to the sample searched by the peak-value detector being determined as a starting point of a frame.
摘要翻译：公开了一种用于在具有归一化器的通信系统中获取初始帧定时的装置，该归一化器根据监视期间的接收信号的采样功率计算归一化窗功率;交叉功率计算器，其从样本的交叉功率计算窗口交叉功率在监视期间，并且每个交叉功率对应于两个样本的乘法，分频器将窗口交叉功率除以归一化窗功率，并输出对应于监视周期的样本的度量，以及峰值检测器在预定时间段内搜索具有接收信号样本的度量中的最大值的样本，并且通过将监测周期移位，通过峰值检测器搜索的样本旁边的样本被确定为一个框架的起点。

36. 发明授权

US07782966B2 Demodulator of base station in orthogonal frequency division multiple access 有权
标题翻译：基站解调器正交频分多址
公开(公告)号：US07782966B2
公开(公告)日：2010-08-24
申请号：US11721155
申请日：2005-11-09
申请人： Young-Ha Lee , Youn-Ok Park
发明人： Young-Ha Lee , Youn-Ok Park
IPC分类号： H04L27/28
CPC分类号： H04L27/22 , H04L1/0026 , H04L1/18 , H04L5/0007 , H04L5/0053 , H04L27/2647
摘要： A base station demodulator according to the exemplary embodiment of the present invention includes a vector index demodulator, and a channel value detector. The vector index demodulator demodulates CQI or ARQ ACK/NACK channels by multiplying QPSK modulation signals transmitted as m subcarriers in a tile by m conjugate complexes corresponding to the m subcarriers, and determines the greatest value of the demodulation results as a vector index. The channel value detector inputs n vector indexes demodulated by the vector index demodulator to a first shift register, inputs n subsequent vector indexes to a second shift register, and detects a channel value for the CQI or the ARQ ACK/NACK by repeating the above vector index input to the first and second shift registers m-times.
摘要翻译：根据本发明的示例性实施例的基站解调器包括矢量索引解调器和信道值检测器。矢量索引解调器通过将通过m个子载波发送的QPSK调制信号乘以与m个子载波相对应的m个共轭复合来解调CQI或ARQ ACK / NACK信道，并将解调结果的最大值确定为向量索引。信道值检测器将由向量索引解调器解调的n个向量索引输入到第一移位寄存器，将n个后续向量索引输入到第二移位寄存器，并通过重复上述向量来检测CQI或ARQ ACK / NACK的信道值索引输入到第一和第二移位寄存器m次。

37. 发明申请

US20080123517A1 Synchronous Orthogonal Frequency Division Multiplexing Receiving Apparatus in Multi-Cell Environment and Method Thereof 有权
标题翻译：多单元环境中的同步正交频分复用接收装置及其方法
公开(公告)号：US20080123517A1
公开(公告)日：2008-05-29
申请号：US11720605
申请日：2005-11-10
申请人： Jun-Woo Kim , Jae-Gun Jung , Youn-Ok Park
发明人： Jun-Woo Kim , Jae-Gun Jung , Youn-Ok Park
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0016 , H04L25/03866 , H04L27/2602 , H04L27/2656 , H04L27/2678
摘要： A receiving apparatus of a mobile terminal receiving a signal in a synchronous OFDM system under a multi-cell environment, including a demodulation start controller performing frame synchronization and cell search using a received signal and outputting information on a demodulation start point and a to-be-demodulated neighbor cell; a FFT unit converting a time-domain signal into a frequency-domain signal; a scramble code generator generating scramble codes for the to-be-demodulated neighbor cell from the demodulation start controller and the current cell; a correlator multiplying a signal from the FFT unit and scramble codes from the scramble code generator and outputting correlation signals; demodulators provided corresponding to a current cell and a maximum number of neighbor cells to be demodulated, and demodulating the correlation signals; and a decoder decoding signals from the demodulators and restoring original information transmitted from the corresponding cell.
摘要翻译：一种在多小区环境下在同步OFDM系统中接收信号的移动终端的接收装置，包括：解调启动控制器，使用接收信号执行帧同步和小区搜索，并输出关于解调起始点和待机信号的信息调制相邻单元; 将时域信号转换为频域信号的FFT单元; 扰码代码生成器，用于从解调起始控制器和当前小区为待解调的相邻小区生成扰码; 相关器将来自FFT单元的信号和来自加扰码发生器的扰码相乘并输出相关信号; 对应于当前小区提供的解调器和要被解调的最大数量的相邻小区，以及对相关信号进行解调; 以及解码器，对来自解调器的信号进行解码并恢复从相应的单元发送的原始信息。

38. 发明申请

US20070291633A1 Transmitting Apparatus in Orthogonal Frequency Division Multiplexing Access System Capable of Controlling Gain for Variation of Sub-Channel Allocation and Method for Transmitting Data Thereof 有权
标题翻译：正交频分复用接入系统中的发射装置，能够控制增益用于子信道分配的变化和发送数据的方法
公开(公告)号：US20070291633A1
公开(公告)日：2007-12-20
申请号：US11667938
申请日：2005-09-07
申请人： Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
发明人： Dae-Ho Kim , Jun-Woo Kim , Youn-Ok Park
IPC分类号： H04J11/00
CPC分类号： H04L27/2626 , H04L5/023
摘要： The present invention relates to a transmitter of an OFDMA system capable of controlling a gain for variation of subchannel allocation, and a method thereof. The transmitter includes a subchannel number determining unit, a modulator, a digital/analogue converter, and a gain controller controlling the gain. The subchannel number determining unit determines the number of subchannels in use according to communication environments, and the modulator modulates transmission data with reference to the number of subchannels determined by the subchannel number determining unit and outputs the modulated transmission data. The digital/analogue converter converts the transmission data into analogue data and transmits the converted analogue data through a transmit antenna. The gain controller controls gains of the transmission data according to gain values corresponding to the number of subchannels.
摘要翻译：本发明涉及能够控制用于子信道分配变化的增益的OFDMA系统的发射机及其方法。发射机包括子信道号确定单元，调制器，数/模转换器和控制增益的增益控制器。子信道号确定单元根据通信环境确定正在使用的子信道的数量，并且调制器参照由子信道号确定单元确定的子信道的数量来调制发送数据，并输出调制的发送数据。数字/模拟转换器将传输数据转换为模拟数据，并通过发送天线发送转换的模拟数据。增益控制器根据对应于子信道数量的增益值控制传输数据的增益。

39. 发明授权

US08600420B2 Method and apparatus for uplink timing synchronization with ranging signal in mobile communication system 有权
标题翻译：用于在移动通信系统中与测距信号进行上行链路定时同步的方法和装置
公开(公告)号：US08600420B2
公开(公告)日：2013-12-03
申请号：US12094763
申请日：2006-12-08
申请人： Young-Ha Lee , Chang-Wahn Yu , Youn-Ok Park
发明人： Young-Ha Lee , Chang-Wahn Yu , Youn-Ok Park
IPC分类号： H04B15/00 , H04W72/00 , H04W74/00 , H04W4/00 , H04J3/06
CPC分类号： H04L27/2655 , H04L27/2646
摘要： When a base station of a time division duplex based mobile communication system receives an initial ranging request signal from a subscriber station, the base station generates initial ranging information including delay time information to the subscriber station, and receives uplink data delayed and transmitted using a delay time from the subscriber station. Also, when the subscriber station transmits an initial ranging request signal to the base station and receives initial ranging information including delay time information from the base station, the subscriber station establishes a transmission parameter value by using the transmission parameter value included in the initial ranging information and transmits uplink data by using the established delay time.
摘要翻译：当基于时分双工的移动通信系统的基站从用户站接收到初始测距请求信号时，基站向用户站生成包括延迟时间信息的初始测距信息，并且接收延迟并使用延迟发送的上行链路数据来自用户站的时间。此外，当用户台向基站发送初始测距请求信号并从基站接收包括延迟时间信息的初始测距信息时，用户台通过使用包含在初始测距信息中的传输参数值来建立传输参数值并通过使用建立的延迟时间来发送上行链路数据。

40. 发明授权

US08161093B2 Complex multiplier and twiddle factor generator 有权
标题翻译：复数乘法器和旋转因子发生器
公开(公告)号：US08161093B2
公开(公告)日：2012-04-17
申请号：US11862055
申请日：2007-09-26
申请人： Young-Ha Lee , Youn-Ok Park
发明人： Young-Ha Lee , Youn-Ok Park
IPC分类号： G06F7/52
CPC分类号： G06F17/142
摘要： The present invention relates to a complex multiplier and a twiddle factor generator. The complex multiplier according to an embodiment of the invention includes: a first adder/subtracter that adds the real part of the complex number and a first twiddle factor or subtracts the first twiddle factor from the real part of the complex number according to a first signal; a second adder/subtracter that adds the imaginary part of the complex number and a second twiddle factor or subtracts the second twiddle factor from the imaginary part of the complex number according to a second signal; a first multiplier that multiplies the value obtained by the first adder/subtracter by a third twiddle factor and outputs the resulting value; a second multiplier that multiplies the value obtained by the second adder/subtracter by a fourth twiddle factor and outputs the resulting value; a multiplexer that selectively outputs the values output from the first and second multipliers as a real part output signal and an imaginary part output signal according to a third signal; and a controller that provides the first to third signals. According to the present invention, it is possible to achieve a complex multiplier having a simple hardware design.
摘要翻译：本发明涉及复数乘法器和旋转因子发生器。根据本发明的实施例的复数乘法器包括：第一加法器/减法器，其将复数的实部和第一旋转因子相加，或者根据第一信号从复数的实部中减去第一旋转因子 ; 第二加法器/减法器，其将复数的虚部和第二旋转因子相加，或者根据第二信号从复数的虚部中减去第二旋转因子; 第一乘法器，将由第一加法器/减法器获得的值乘以第三旋转因数，并输出所得到的值; 第二乘法器，将由第二加法器/减法器获得的值乘以第四旋转因子，并输出所得到的值; 多路复用器，根据第三信号有选择地输出从第一和第二乘法器输出的值作为实部输出信号和虚部输出信号; 以及提供第一至第三信号的控制器。根据本发明，可以实现具有简单的硬件设计的复数乘法器。

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